. ♪ lou: the weekend murder suicide committed by kannas city linebacker left the nfl community and the country just grasping for answers as to what was going on in this amendment. a great tragedy. the sixth nfl player in the past two years to take is on life. six nfl players raising the questions about traumatic brain energy, the nfl, and what is going on. joining us to help understand as best we can what happened and what we should be thinking about your as citizens, parents and family members and friends, ychologists and professor and psychotherapist. let me start with the fact that this was such a -- i mean, he apparently sh his girlfriend nine times. i mean, this is just an unbelievable. his friends to my teammates, coaches, no one tbelieve he had done it. >> but this was also someone who was abusing alcohol and rugs who may have had a brain injury, although i would say the probably the abuse of alcohol and drugs can make a depression re profound to make him ore out of touch and more desperate. it. lou: a number of people and commented about his short-term memory that he was demons